We look at the division of 375855 by 7 
The aim is to understand the frequency of 7 in 375855.

Moving on to step 1:
When dividing 3 by 7, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 7

Moving on to step 2:
37 divided by 7 is 5 with a remainder of 2.
The next digit of our result is 5. 
Result so far: 5.0
If we take 35 away from 37, we end up with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 7

Step 3:
If we divide 25 by 7, we get 3 and a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 53.0
Subtract 21 from 25 to get 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 7

Advancing to step 4:
7 can be fit into 48 6 times, resulting in a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 536.0
If we take 42 away from 48, we end up with 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 7

On to step 5:
7 goes into 65 9 times with a remainder of 2.
The next digit of our result is 9. 
Result so far: 5369.0
Deduct 63 from 65 and we're left with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 7

Moving on to step 6:
If we divide 25 by 7, we get 3 and a remainder of 4.
The next digit of our result is 3. 
Result so far: 53693.0
If we take 21 away from 25, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
7 can be fit into 40 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 53693.5
The remainder is 5 after subtracting 35 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
7 can be fit into 50 7 times, resulting in a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 53693.57
If we take 49 away from 50, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
The number 7 fits into 10 1 times, leaving a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 53693.571
Deduct 7 from 10 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 10:
The number 7 fits into 30 4 times, leaving a remainder of 2.
The next digit of our result is 4. 
Result so far: 53693.5714
If we take 28 away from 30, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
7 goes into 20 2 times with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 53693.57142
Subtract 14 from 20 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
If we divide 60 by 7, we get 8 and a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 53693.571428
If we take 56 away from 60, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 13:
If we divide 40 by 7, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 53693.5714285
Deduct 35 from 40 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 14:
If we divide 50 by 7, we get 7 and a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 53693.57142857
The remainder is 1 after subtracting 49 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

In conclusion, the division gives 53693.57142857 with a balance of 1e-09.